Sample LC81-637

NavDat sample number 61091 · ANDESITE

Sample

Sample ID	LC81-637
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Clynne
Comment	Mount Harkness

Location

Latitude	40.4144
Longitude	-121.341
State / province	California
Volcanic field	Dittmar Volcanic Center

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
2.65		0	5.3

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	68.36		WT%	WDXRF
AL2O3	14.87		WT%	WDXRF
FE2O3	0.88		WT%	WDXRF
FEO	3.16		WT%	WDXRF
FEOT	3.95		WT%	WDXRF
MGO	1.1		WT%	WDXRF
CAO	3.09		WT%	WDXRF
NA2O	4.59		WT%	WDXRF
K2O	2.77		WT%	WDXRF
TIO2	0.86		WT%	WDXRF
P2O5	0.22		WT%	WDXRF
MNO	0.11		WT%	WDXRF
LOI	2.91		WT%	LOI
TOTAL	97.18		WT%	WDXRF
MG_NUMBER	38.4			WDXRF
RB	43		PPM	EDXRF
SR	260		PPM	EDXRF
BA	759		PPM	EDXRF
Y	38		PPM	EDXRF
ZR	223		PPM	EDXRF
NB	3		PPM	EDXRF

References

Clynne, M.A., Muffler, L.J.P., Siems, D.F., Taggert Jr., J.E., Bruggman, P. (2008) Major and EDXRF trace element chemical analyses of volcanic rocks from Lassen Volcanic National Park and vicinity, California. Open-File Report - U. S. Geological Survey. 2008. Report # OF. 2008-1091